ALTools
Rotate Video
Fix sideways phone footage or flip orientation. Rotate 90°, 180°, or mirror horizontally and vertically — export a corrected MP4 locally in your browser.
How to use this tool — step-by-step guideHow Video Rotation Works
Upload MP4, MOV, WebM, or other common formats. Pick a rotation or flip preset, then export a corrected MP4. ALTools processes everything locally — no upload and no account.
Sideways phone footage is the most common fix: 90° clockwise usually turns vertical recordings horizontal for YouTube and desktop players. 90° and 270° rotations also swap width and height in the output file.
Use flip horizontal or vertical for mirror fixes, selfie cams, or stylized edits without opening a full editor.
Rotation re-encodes video to H.264 MP4 for broad compatibility.
Longer clips take more time because every frame is decoded and re-encoded. There is no fixed duration cap like some other tools, but very large exports can stream directly to the save location you choose.
Download the corrected MP4 or combine with Crop Video and Social Media Resize before publishing.
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Frequently Asked Questions
Will rotating re-encode my video?
Yes. Rotation changes pixel orientation, so the tool exports a new H.264 MP4. Quality follows your source; very long or high-resolution clips take longer to process.
Which preset fixes sideways iPhone video?
Try 90° clockwise first. If the result is upside down, use 90° counter-clockwise or 180° instead.
Do large files download differently?
On capable devices, exports above about 300 MB to 1 GB (depending on available memory) may ask you to pick a save location and stream the result straight to disk, so the finished file does not have to sit entirely in memory.
How is this different from cropping?
Rotate Video changes orientation. Crop Video removes edges of the frame without turning the picture.
Is my video uploaded?
No. Rotation is processed locally in your browser.